Summary

  • Four USPTO terminal-disclaimer forms updated in September 2026 now accommodate up to ten references instead of a single field, reducing the need for multiple filings or custom forms.
  • For a patent carrying the relevant common-ownership promise, a sale that separates its owner from a reference patent’s owner can unsettle the intended enforcement model. The actual disclaimer and the ownership after closing determine what needs to stay connected.

A tidy sale schedule meets an untidy attachment

The asset schedule has an attractive simplicity. One patent, one row, one asking price. A buyer can mark the rights it wants while the seller keeps the rest. Then an old document from the prosecution file brings another patent into the room. The selected asset has been travelling with conditions that the spreadsheet omitted.

The USPTO’s latest paperwork improvement supplies a useful place to look. On 22 September 2026, the agency announced new and revised disclaimer forms. Four forms based on common ownership now provide space for up to ten references. Previously, the forms offered one reference field. Applicants with several references had to submit multiple disclaimers, with multiple fees, or make their own forms.

That is a sensible reduction in clerical work. The sentence that matters to an acquirer sits above the new blank lines. In the September 2026 PTO/SB/26a form, the patentee agrees that the subject patent is enforceable only during the period when it and the reference patent are commonly owned. The agreement follows the subject patent and binds successors and assignees.

A new owner receives the promise along with the asset. The agency has made the form easier to complete. It has not volunteered to make the future sale package easier to take apart.

The decision made at the entrance waits at the exit

A terminal disclaimer gives up a terminal portion of a patent’s term. The relevant kind here is used to overcome a nonstatutory double-patenting rejection and includes a common-ownership enforcement condition. It concerns both time and the circumstances of enforcement. An expiry date copied into a valuation model captures only part of that bargain.

The USPTO’s examination manual, section 804, explains two purposes: preventing an unjustified extension of the right to exclude, and preventing potential harassment of an accused infringer by multiple assignees holding patents on the same patentable invention. The ownership condition addresses the second problem. Merely aligning dates would leave that problem available to a portfolio splitter.

There is another business on the receiving end of the rule, then: the company against which the rights might be asserted. Whether related claims remain with common owners or reach several independent pursuers matters to that company.

During prosecution, filing a disclaimer can be a choice that resolves the relevant objection and moves an application forward. Years later, the patent owner may want to sell a product line or a selection of rights. The earlier choice now participates in the commercial decision about what can be offered separately.

The patent team and the deal team have different calendars and budgets. One wants to obtain rights efficiently. The other wants to package them around buyer demand. The old filing connects their work even if the internal handover does not.

Title can move while the condition remains

Under section 301 of the manual, patents have the attributes of personal property and interests in them can be assigned in writing. Patent ownership principally gives a right to exclude others from specified acts involving the claimed invention. Ownership itself also does not supply every permission that might be needed to practise a technology.

For a sale, a further distinction matters. The assignment transfers an ownership interest. The recorded disclaimer retains a condition on enforcement of the subject patent. The new document and the old one are doing different jobs.

Suppose a seller owns both a patent carrying this promise and the reference patent. It sells the first and retains the second. The owners separate. The buyer may have received the agreed title, but its new signature has not erased the old common-ownership condition. If the acquisition case depends on independently enforcing the purchased patent, the separation reaches into the basis of that case.

Section 1490 makes the timing explicit: common ownership for a terminal disclaimer is required at enforcement. Evidence that the patents shared an owner when the application was filed does not answer the question about the position after closing.

A particular buyer’s exposure would require the actual sale agreement, filed disclaimers and reference chain, and transaction price; those records are absent here. The official material identifies the condition to investigate before attaching a loss estimate to a real deal.

Follow the references, including their direction

Ten is the capacity of the updated form. It is neither a mandatory shopping list nor a universal size for a patent package. The operative references come from the disclaimer actually filed.

Their direction matters too. Which patent carries the undertaking? Which is the reference? Which side would the proposed transaction move? A broad patent-family label can hide a relevant link or bundle together assets that do not bear this particular condition. The filed instrument offers a more exact map.

The September notice also introduces forms for the separate joint-research-agreement route. That route has its own conditions concerning the waiver of separate enforcement. Identifying the document in the file comes before choosing the rule to apply to it.

Once the connections are visible, buyer and seller have something concrete to negotiate. They can consider a wider acquisition, a different intended use, a revised sale perimeter or another price. Whether a proposal works depends on the actual texts and resulting ownership. A polished transaction label cannot do that work.

A filing saving leaves a packaging question

Reducing repeated submissions is useful administrative progress. The updated forms do not newly invent the common-ownership condition; they give filers more room to record references. Easier filing can coexist quite comfortably with a harder future carve-out.

For companies that accumulate patents before deciding which businesses to keep, the practical issue is institutional memory. The prosecution file needs to inform the disposal file. If only numbers and expiry dates make the journey, the sales team may promise a standalone enforcement asset whose intended use still depends on another right it planned to retain.

Early discovery permits comparisons between packages. Late discovery can force a negotiated package open again, with sunk transaction costs already narrowing the appetite for changes. There is no need to invent a universal discount to see the difference between those bargaining positions.

A patent can have its own number and its own price while carrying an enforcement condition that requires company. The sale schedule may separate rows perfectly. Someone still has to check whether the rights can perform separately on the terms being sold.